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Daylight Calculator

Calculate daylight duration from sunrise and sunset.

InputsChange a value to recalculate instantly
ResultUpdates as you type
Daylight duration13h 0m
Daylight hours13 h
PHYSICAL SIMULATOR

Solar Elevation & Daylight Simulator

LIVE ENGINE 60FPS

Solar Position & Daylight Arc

Interactive simulation of solar elevation angle, twilight transition, and daylight hours.

Solar Noon Zenith Arc Active
FORMULA & STEPSDaylight Calculator — Mathematical Derivation & Steps
1 StepsSequential Calculation Breakdown
1
Subtract clock times
The result is normalized to a 24-hour clock.
λ DooMathWork with this calculation
Local · deterministic · optional
auto_awesome
Quick mathNatural-language-style shortcuts for deterministic arithmetic.
Calculator guide

How to use the Daylight Calculator

Calculate daylight duration from sunrise and sunset.

01Set inputsChoose values, units and assumptions.
02Apply the modelUse the stated mathematical relationship.
03Read the resultCheck the output against the assumptions before using it.
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What this calculator does

Calculate daylight duration from sunrise and sunset.

functions

Formula & method

The result is calculated from the inputs and assumptions shown in the calculator.

fact_check

Assumptions & notes

Review the inputs, units and assumptions before using the result for a real decision.